Historic US highway endpoint near Ucolo, UT
The stretch of highway between Dove Creek CO and Monticello UT has seen an inordinate amount of numbering changes.
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- 1939-1970: US 160 replaced the remainder of US 450 through Utah.
- 1970-2003: the US 160 designation was rerouted to go southwest out of Cortez CO (instead of northwest), so this route was renumbered as an extension of US 666.
- 2003-present: the entirety of US 666 was replaced with US 491.
Research and/or photo credits: Steve Lockwood; Dale Sanderson; Thomas Silas
Page originally created 2004;
last updated Jan. 15, 2021.
last updated Jan. 15, 2021.